on black friday, u.s. shoppers were not just buying toys and electronics but guns in record numbers. on that single day the fbi did computerized background checks on more than 154,000 purchases of firearms. and in november alone, americans tried to buy a whopping 2 million guns. here's some fact that is might surprise you. there are more registered gun dealers in stores than major supermarkets. >>> more gun sellers than mcdonald's restaurants. the overwhelming majority of gun owners are law-abiding citizens but authorities tell abc news the millions of guns in circulation guarantee that disturbed people will often be able to obtain them even in tight-knit communities like newtown. we spoke to atf's on-scene commander to newtown. in roughly how many gun dealers are in this area. >> there are about 400 gun dealers in a four-counter area just within ten miles of the incident there are 36. >> reporter: in the case of adam lanza law enforcement authorities tell us the two handguns and assault rifle used in the